Last time I was up there, only the lower section was a no shooting area. Once you get past the turn for the dirt riders to go up the hill, the upper section was ok to shoot. I haven’t been up there for a few months, so things may have changed.
Regarding the shootings that took place,
Turned out that someone in a parks uniform/shirt walked up the trial/road and told the boys that they were in volition of something and demanded the firearms. When he got them, he shot them with there own weapons. My thoughts are if someone wants to fine me, then go ahead, just don't ask for my weapons or it will be the worst fire fight that they will never remember. Of all the times I have been up there and talked to the rangers, they have never asked to see any on my firearms. Plus, they always pull up in the department trucks and are packing themselves so you know that they are legit.
Ditto with the pistol on my hip at all times.
I strap a big ass SS wheel gun on and never take it off until its time to pack up and go home. Went up one weekend and you would have thought that it was a noobie shoot off. Idiots where just spraying the shooting bank from all locations around the fire ring (real short season since they all lack the funds to buy more that a box of ammo for each of the weapons). The only reason that I stayed was that I had way too much brass on the ground to police, and had to wait them out.
The only time I go up there now is on the weekdays, or very, very early on a weekend. By noon, the place is a zoo on the weekends. Plus, I don't live in Boulder anymore, so the real road trip is just to eat lunch at Deli zone, and stop at Bighorn trading to shoot the shit with the guys.